Home / 15,445.62-21,316.11-8,640.21

Finding the Fourth Proportional to 15,445.62, 21,316.11 and 8,640.21

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Solution

The fourth proportional to 15,445.62, 21,316.11 and 8,640.21 is: 11,924.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.62 : 21,316.11 = 8,640.21 : x
  2. Step 2: Convert to fraction form
    15,445.62/21,316.11 = 8,640.21/x
  3. Step 3: Cross multiply
    15,445.62x = 21,316.11 × 8,640.21
  4. Step 4: Simplify right side
    15,445.62x = 184,175,666.78
  5. Step 5: Solve for x
    x = 184,175,666.78/15,445.62
  6. Step 6: Final answer
    x = 11,924.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.